Skin color proxies white ancestry in African Americans and Hispanics. Lighter skin correlates with higher g in blacks (r=-0.133, N=1856). T scores unrelated to skin color in blacks (r=-0.012, ns). Lighter skin correlates with higher g in Hispanics (r=-0.123, N=1051). T scores unrelated to skin color in Hispanics (r=0.062, ns). MCV shows skin color-test gaps align with g loadings in blacks (r=-0.84, rho=-0.75). MCV confirms pattern in Hispanics (r=-0.60, rho=-0.59). Lighter coracials outscore darker ones more on high-g tests. Results match hereditarian hypothesis. T factor drives some gaps but uncorrelated with skin color. T likely low heritability and non-genetic racial link. ASVAB g explains most black-white gap (d=1.124). T contributes less to gaps (black-white d=0.561). Within-family tests could rule out colorism.